Why Starting A Blog is Smart Business Why should you write a blog? If you are running your business online, then a blog is essential. You may be functioning on information overload right now. You have had way too many “systems” and “training” and “absolute must-have tools” for your business shoved in your face. However, a blog is not one of them. A few statistics from blog.hubspot.com: 61% of global Internet users research products online.